install the trailers channel

[tillhanke]

I just stumbled upon the Trailer section and got confused, how to find the "trailer channel". Looking into the jellyfin repo I found a old Issue (https://github.com/jellyfin/jellyfin/issues/2963) in which this is discussed at length. There is also a plugin mentioned: https://github.com/crobibero/jellyfin-plugin-tmdb-trailers which will include the trailers into jellyfin.

Now I think it would be better for future users, if this way is not necessary to find the plugin. Couldn't it just be mentioned in the error text: https://github.com/jellyfin/jellyfin-web/blob/6eb760b03ca438bd7a334e0e930bb777a6671856/src/strings/en-us.json#L1090 Either mention the closed issue, or the plugin directly?

Thanks for the hard work! I really love Jellyfin.